Surface-treated material and component produced by using the same

Patent metadata

Field	Value
Publication number	US-2019323136-A1
Application number	US-201716473822-A
Country	US
Kind code	A1
Filing date	Dec 26, 2017
Priority date	Dec 27, 2016
Publication date	Oct 24, 2019
Grant date	—

Abstract

A surface-treated material ( 10 ) according to the present invention comprises an electroconductive substrate ( 1 ) and a surface treatment film ( 2 ) formed of at least one or more layers of metal layers ( 3 and 4 ) which are formed on the electroconductive substrate ( 1 ), wherein among the at least one or more layers of metal layers ( 3 and 4 ), the lowermost metal layer ( 3 ) which is directly formed on the electroconductive substrate ( 1 ) comprises a plurality of metal-buried portions ( 3 a ) that are scattered in the electroconductive substrate ( 1 ), branch from a surface of the electroconductive substrate ( 1 ) and widely extend toward the inside thereof, and as a vertical cross section of the surface-treated material ( 10 ) is viewed, in which at least one of the metal-buried portions ( 3 a ) exists in the electroconductive substrate ( 1 ), an average value of an area ratio of the metal-buried portion ( 3 a ) occupying the predetermined observation region of the electroconductive substrate ( 1 ) is in a range of 5% or more and 50% or less.

First claim

1 . A surface-treated material comprising an electroconductive substrate and a surface treatment film formed of at least one or more layers of metal layers which are formed on the electroconductive substrate,
wherein among the at least one or more layers of metal layers, a lowermost metal layer which is a metal layer directly formed on the electroconductive substrate comprises a plurality of metal-buried portions that are scattered in the electroconductive substrate, branch from a surface of the electroconductive substrate and widely extend toward an inside thereof; and when a region is defined as an observation region of the electroconductive substrate as a vertical cross section of the surface-treated material is viewed, in which at least one of the metal-buried portions exists in the electroconductive substrate, the region being demarcated by a first line segment that is drawn on the surface of the electroconductive substrate, a second line segment that is drawn so as to pass through a terminal position of the metal-buried portion, at which the metal-buried portion extends longest along a thickness direction of the electroconductive substrate, and be parallel to the first line segment, and third and fourth line segments that pass through respective positions of a cross-sectional width of the electroconductive substrate of 20 μm with the metal-buried portion having the terminal position as a center, and are orthogonal to each of the first line segment and the second line segment, an average value of an area ratio of the metal-buried portion in the observation region is in a range of 5% or more and 50% or less.

2 . A surface-treated material comprising an electroconductive substrate and a surface treatment film formed of one or more layers of metal layers on the electroconductive substrate,
wherein among the metal layers forming the surface treatment film, a lowermost metal layer in contact with the electroconductive substrate comprises a plurality of metal-buried portions that branch from a surface of the electroconductive substrate and widely extend toward the inside thereof, and in a vertical cross section of the electroconductive substrate in which the metal-buried portion exists, an average value of an area ratio of the metal-buried portion occupying an observation region represented by (cross-sectional width parallel to surface of electroconductive substrate of 20 μm)×(depth from surface of electroconductive substrate to terminal position of metal-buried portion) is in a range of 5% or more and 50% or less.

3 . The surface-treated material according to claim 1 , wherein the metal-buried portion has a maximum extension length of a range of 0.5 μm or more and 25 μm or less, as measured along a thickness direction from the surface of the electroconductive substrate to the terminal position.

4 . The surface-treated material according to claim 1 , wherein the electroconductive substrate is aluminum or an aluminum alloy.

5 . The surface-treated material according to claim 1 , wherein the lowermost metal layer is nickel, a nickel alloy, cobalt, a cobalt alloy, copper or a copper alloy.

6 . The surface-treated material according to claim 1 , wherein the surface treatment film is formed of the lowermost metal layer and one or more layers of metal layers formed on the lowermost metal layer, wherein the one or more layers of metal layers are formed of any metal selected from the group consisting of nickel, a nickel alloy, cobalt, a cobalt alloy, copper, a copper alloy, tin, a tin alloy, silver, a silver alloy, gold, a gold alloy, platinum, a platinum alloy, rhodium, a rhodium alloy, ruthenium, a ruthenium alloy, iridium, an iridium alloy, palladium and a palladium alloy.

7 . The surface-treated material according to the claim 6 , wherein the one or more layers of metal layers are composed of two or more layers of metal layers.

8 . A terminal produced with use of the surface-treated material according to claim 1 .

9 . A connector produced with use of the surface-treated material according to claim 1 .

10 . A bus bar produced with use of the surface-treated material according to claim 1 .

11 . A lead frame produced with use of the surface-treated material according to claim 1 .

12 . A medical member produced with use of the surface-treated material according to claim 1 .

13 . A shield case produced with use of the surface-treated material according to claim 1 .

14 . A coil produced with use of the surface-treated material according to claim 1 .

15 . A contact switch produced with use of the surface-treated material according to claim 1 .

16 . A cable produced with use of the surface-treated material according to claim 1 .

17 . A heat pipe produced with use of the surface-treated material according to claim 1 .

18 . A memory disk produced with use of the surface-treated material according to claim 1 .

Assignees

• Furukawa Electric Co Ltd

Inventors

• Kobayashi Yoshiaki
• Yamauchi Miho

Classifications

• H01B1/023

  Alloys based on aluminium · CPC title

• C25D3/12

  of nickel or cobalt · CPC title

• H01B1/02

  mainly consisting of metals or alloys · CPC title

• C25D5/44

  Aluminium · CPC title

• C25D3/38

  of copper · CPC title